Bigraph is a simple graph that has bidirected edges. To create a bigraph, use bigraph.
The object Bigraph is a type, with ancestor classes Graph < Digraph < HashTable < Thing.
The source of this document is in /build/reproducible-path/macaulay2-1.25.06+ds/M2/Macaulay2/packages/StatGraphs.m2:368:0.